I believe most of the lead was surrendered by the starting lineup during the third period. When Brand came in things stabilized a bit. I lost the feed at the beginning of the fourth so I'll have to wait for Brian's rotation chart to see for sure.

The DET run started w/ the starting lineup still in there in the third and really continued until he got Jrue, Iguodala, Thad, Brand and Sam in at the 8:15 mark of the fourth. That lineup kept it around 10 the rest of the way, pretty much, I think the closest they got was 7, the biggest the lead grew was maybe 14 in that stretch.